CN106597467B - A kind of rangefinder based on HOM principle of interference - Google Patents
A kind of rangefinder based on HOM principle of interference Download PDFInfo
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- CN106597467B CN106597467B CN201611046320.6A CN201611046320A CN106597467B CN 106597467 B CN106597467 B CN 106597467B CN 201611046320 A CN201611046320 A CN 201611046320A CN 106597467 B CN106597467 B CN 106597467B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/46—Indirect determination of position data
- G01S17/48—Active triangulation systems, i.e. using the transmission and reflection of electromagnetic waves other than radio waves
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- Computer Networks & Wireless Communication (AREA)
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- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Optical Radar Systems And Details Thereof (AREA)
Abstract
A kind of rangefinder based on HOM principle of interference, including tangle source, delayer, beam splitter, the first detector, the second detector, reflecting mirror, semi-transparent semi-reflecting lens, part reflective mirror to be measured and coincidence measurement logic computer.The upper photon tangled in source is beaten on beam splitter by delayer, lower photon is beaten on beam splitter after semi-transparent semi-reflecting lens or part mirror reflection to be measured, it is detected respectively by the first detector and the second detector after beam splitting, is then done by the signal that coincidence measurement logic computer exports detector and meet logic calculation.By adjusting the delay τ of delayer, so that the lower photon through semi-transparent semi-reflecting lens or part reflective mirror to be measured interferes cancellation with upper photon respectively, two delay τ are recorded1And τ2, part reflective mirror to be measured is calculated the distance between to semi-transparent semi-reflecting lensThe detection of high-precision distance may be implemented in the present invention, can be widely used for the fields such as optical coherence tomography, mechanics of biological tissue detection and precision distance measurement.
Description
Technical field
The present invention relates to a kind of novel measuring distance meter based on HOM principle of interference, and the detection of high-precision distance may be implemented, can
It is widely used in the fields such as optical coherence tomography, mechanics of biological tissue detection and precision distance measurement.
Background technique
Rangefinder be using characteristics such as the reflection, interference of light, sound wave and electromagnetic wave etc., design with length and away from
Instrument from measurement, using length measurement, can also count the pattern of object to be measured on the basis of linear measure longimetry
It calculates.Optical ranging mode is mainly laser ranging at present.Laser ranging is widely used in topographic survey at present, tactics forward position is surveyed
Away from military fields such as, guided missile running track tracking, also have wide practical use in engineer application and field of biomedicine.
Laser range finder currently on the market can be divided into pulsed and continuous wave phase type by realization mechanism.Pulse type laser
The advantage of ranging is that measuring distance is remote, and signal processing is simple, and measured target can be noncooperative target, but its measurement accuracy
Not high, and there are one meter or so of range hole, very widely used today hand-held and Portable distance meter mostly use greatly this
Principle, operating distance are hundreds of meters of even tens of kms, and measurement accuracy is five meters or so.Continuous wave phase laser distance measurement advantage
For measurement accuracy height, relative error is positively retained within hundred a ten thousandths, but measurement distance is remote not as good as pulse type laser ranging, and
Measured target requirement is cooperative target.One drawback of the development of ranging at present is exactly to guarantee to measure distance (or measurement accuracy)
In the case of, it is difficult to further increase measurement accuracy (or measurement distance).It needs to find a kind of high precision and large measuring range range unit.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide a kind of based on HOM principle of interference
Rangefinder realizes the measurement of high accuracy remote.
The technical solution of the invention is as follows: a kind of rangefinder based on HOM principle of interference, including tangle source, delayer,
Beam splitter, the first detector, the second detector, reflecting mirror, semi-transparent semi-reflecting lens, part reflective mirror to be measured and coincidence measurement logic calculation
Device；The part reflective mirror to be measured is placed on part to be measured, and semi-transparent semi-reflecting lens are placed on the reference position of ranging；
The upper photon for tangling the photon centering of source generation enters delayer, is incident on beam splitter after delayer is delayed
On, the lower photon of photon centering enters reflecting mirror, is incident on semi-transparent semi-reflecting lens after reflecting mirror reflects, straight through semi-transparent semi-reflecting lens
The reversed lower photon penetrated is incident on beam splitter, and the lower photon transmitted through semi-transparent semi-reflecting lens is incident on part reflective mirror to be measured, to
The lower photon for surveying part mirror reflection is incident on beam splitter by semi-transparent semi-reflecting lens；
Beam splitter to by delay upper photon and by semi-transparent semi-reflecting lens or part mirror reflection to be measured lower photon into
Row beam splitting；First detector and the second detector are located at two exit ends of beam splitter, after being respectively used to detection beam splitter beam splitting
Optical signal, and the optical signal of detection is exported and gives coincidence measurement logic computer；
The optical signal that coincidence measurement logic computer detects the first detector and the second detector, which is done, meets logic calculation,
To judge the upper photon by delay and pass through the lower photon of semi-transparent semi-reflecting lens or part mirror reflection to be measured whether interfere
Cancellation, when by the τ that is delayed1Upper photon and by semi-transparent semi-reflecting lens reflection lower photon interfere cancellation, through delay τ2's
When upper photon and the lower photon for passing through part mirror reflection to be measured interfere cancellation, formula is utilized
Part reflective mirror to be measured is calculated to the distance between semi-transparent semi-reflecting lens l.
The optical signal that the coincidence measurement logic computer detects the first detector and the second detector, which is done, meets logic
It calculates, to judge the upper photon by delay and pass through the lower photon of semi-transparent semi-reflecting lens or part mirror reflection to be measured whether occur
Interfere the implementation of cancellation as follows:
(a) the partially larger than preset threshold value of the optical signal overlapping detected when the first detector and the second detector
When, meeting the coincidence counting that logic calculation obtains is 1, and there is no interfering cancellation for upper photon and lower photon at this time；
(b) part of the optical signal overlapping detected when the first detector and the second detector is less than preset threshold value
When, meeting the coincidence counting that logic calculation obtains is 0, and upper photon and lower photon interfere cancellation at this time.
Compared with prior art, the invention has the following beneficial effects:
(1) measuring range is big
The present invention is based on HOM principle of interferences to interfere cancellation when upper photon and lower photon equivalent optical path, so that it may
It realizes ranging, can be realized remote ranging, while measurement blind area is not present in the present invention, and does not need cooperative target, nearly one
Ranging also may be implemented completely in rice, therefore, measurement blind area is not present compared to pulsed laser ranging in the present invention, compares continuous wave phase
Position formula laser ranging can be based on noncooperative target ranging, while far measuring distance (range is big).
(2) resolution of ranging is high
The present invention using HOM principle of interference realize, HOM interference a significance be that may be implemented high-precision away from
From detection, distance resolution exists compared to pulse type laser ranging and continuous wave phase laser distance measurement up to micron dimension
It is more advantageous in terms of measurement accuracy, it can be widely used for optical coherence tomography, mechanics of biological tissue detection and precision distance measurement etc.
Field.
(3) invention can also be used in speed measurement
The present invention can be each to place an atomic clock offer time measurement by semi-transparent semi-reflecting lens and part reflector position to be measured
Benchmark, by measuring the distance, combined high precision atomic time benchmark, so that it may calculate part to be measured in ultra-short Time interval
Mobile Mean Speed.
Detailed description of the invention
Fig. 1 is the device of the invention figure.
Specific embodiment
Below in conjunction with attached drawing to a kind of specific embodiment of novel measuring distance meter based on HOM principle of interference of the invention
It is further described in detail.
One significance of HOM interference is that the coherence time that can be used for detecting ultrashort coherence time photon, relies on
The detection of high-precision distance may be implemented in the technology.Therefore, the present invention is based on HOM principle of interferences to propose a kind of novel distance measuring
Instrument, as shown in Figure 1, including tangling source 1, delayer 2, beam splitter 3, the first detector 4, the second detector 5, reflecting mirror 6, semi-transparent
Semi-reflective mirror 7, part reflective mirror 8 to be measured and coincidence measurement logic computer 9.
Tangle the photon of the generation of source 1 to (we are known as upper photon to upper optical path photon, lower optical path photon we be known as lower light
Son) reflecting mirror 6 and delayer 2 will be respectively enterd, by the lower photon of reflecting mirror 6, by the adjustment of reflecting mirror 6, it is incident on half
On saturating semi-reflective mirror 7, lower photon enters beam splitter 3 after the reflection of semi-transparent semi-reflecting lens 7, and upper photon passes through the timing control of delayer 2
Afterwards, also enter beam splitter 3, remember at this time by adjusting the delay τ of delayer 2 so that upper photon and lower photon interfere cancellation
Record delay τ1；Equally, also enter beam splitting after the reflection of part reflecting mirror 8 to be measured by the lower photon of semi-transparent semi-reflecting lens transmission 7
Device 3 also needs the delay τ of adjustment delayer 2 at this time, so that upper photon and lower photon interfere cancellation, same record prolongs
When τ2, according to delay Δ τ=τ2-τ1Value, so that it may calculate part reflective mirror 8 to be measured the distance between to semi-transparent semi-reflecting lens 7
Delayer 2 is used for timing control, by adjusting the delay τ of delayer 2, so that through semi-transparent semi-reflecting lens 7 or part to be measured
The photon of reflective mirror 8 is interfered with delay road photon respectively.After beam splitter 3 is placed in delayer 2 and semi-transparent semi-reflecting lens 7
Face, on the one hand for being split to upper photon, on the one hand for dividing lower photon-echo signal photon after reflection
Beam；First detector 4 and the second detector 5 are respectively placed in two exit ends of beam splitter 3, for receiving detection beam splitter 3
The optical signal detected is output to coincidence measurement logic computer 9 by the optical signal after beam splitting；Semi-transparent semi-reflecting lens 7 are placed in down
In photonic light circuit, as the reference position of ranging, by adjusting the delay of delayer 2, so that upper photon and warp by delay
The lower photon for crossing semi-transparent semi-reflecting lens 7 interferes, and determines the value of delay τ.
Cancellation is interfered when the equivalent optical path of upper photon and lower photon arrival beam splitter according to HOM principle of interference,
Optical signal after light splitting necessarily has a detector detection less than optical signal at this time from the ipsilateral output of beam splitter.When upper photon
When the light path that beam splitter is reached with lower photon is unequal, optical signal after light splitting is exported from the two sides of beam splitter respectively, and at this time the
One detector and the second detector detect optical signal.
Coincidence measurement logic computer carries out meeting logic calculation, to judge the upper photon for passing through delay and by semi-transparent half
Whether anti-mirror 7 or the lower photon of part reflective mirror 8 to be measured reflection interfere the principle of cancellation are as follows:
A is less than preset threshold value when the part for the optical signal overlapping that the first detector 4 and the second detector 5 detect
When, meeting the coincidence counting that logic calculation obtains is 0, turns out the upper photon by delay and the lower photon by reflection reaches
Destructive interference occurs for the equivalent optical path of beam splitter, ipsilateral output of the optical signal after light splitting from beam splitter；
B is partially larger than preset threshold value when what the optical signal that the first detector 4 and the second detector 5 detect was overlapped
When, meeting the coincidence counting that logic calculation obtains is 1, turns out the upper photon by delay and the lower photon by reflection reaches
The light path of beam splitter is unequal, and the optical signal after light splitting is exported from the two sides of beam splitter respectively, needs to readjust delay at this time
Device delay, until coincidence counting is 0.
Such as:
Presetting coincidence measurement threshold value is t0；
If equivalent optical path, destructive interference occurs at beam splitter 3 for upper photon and lower photon, and two photons are ipsilateral from beam splitter
Output, the pulsewidth t of 4 output signal of the first detector4With the pulsewidth t of 5 output signal of the second detector5Lap is less than t0, symbol
Total number is 0；
If light path is unequal, destructive interference do not occur at beam splitter 3 for upper photon and lower photon, and two photons are from beam splitter
Two sides output, the pulsewidth t of 4 output signal of the first detector4With the pulsewidth t of 5 output signal of the second detector5Lap is greater than
t0, coincidence counting 1.
Semi-transparent semi-reflecting lens and part reflector position to be measured can respectively be placed an atomic clock and provide time measurement by the present invention
Benchmark, by measuring the distance between semi-transparent semi-reflecting lens and part reflecting mirror to be measured, combined high precision atomic time benchmark, so that it may
To calculate the Mean Speed that part to be measured is mobile in ultra-short Time interval.
By practical engineering application, the present invention measures that distance is related with transmitting camera lens and detector, and measurement distance can be with
Measurement blind area is not present apart from comparable in laser ranging measurement, and theoretical measurement accuracy will several orders of magnitude higher than laser ranging.
The present invention is that field of precision measurement introduces a kind of completely new ranging scheme, also provides new think of for the technical application of quantum optices
Road.
Herein, it should be noted that the content being not described in detail in this specification is that those skilled in the art pass through this theory
What description and the prior art in bright book can be realized, therefore, do not repeat them here.
The above description is only a preferred embodiment of the present invention, the protection scope being not intended to limit the invention.For ability
For the technical staff in domain, without creative efforts, several modification and replacement can be made to the present invention,
All such modifications and replacement should be covered by the protection scope of the present invention.
Claims (2)
1. a kind of rangefinder based on HOM principle of interference, including delayer (2), beam splitter (3), the first detector (4), second
Detector (5), semi-transparent semi-reflecting lens (7), part reflective mirror to be measured (8) and coincidence measurement logic computer (9), the part to be measured are reflective
Mirror (8) is placed on part to be measured, and semi-transparent semi-reflecting lens (7) are placed on the reference position of ranging, it is characterised in that: further include tangling
Source (1) and reflecting mirror (6)；
The upper photon of photon centering for tangling source (1) generation enters delayer (2), is incident on after delayer (2) delay point
On beam device (3), the lower photon of photon centering enters reflecting mirror (6), is incident on semi-transparent semi-reflecting lens after reflecting mirror (6) reflection
(7), the lower photon directly reflected through semi-transparent semi-reflecting lens (7) is incident on beam splitter (3), through under semi-transparent semi-reflecting lens (7) transmission
Photon is incident on part reflective mirror (8) to be measured, and the lower photon of part reflective mirror (8) reflection to be measured is incident by semi-transparent semi-reflecting lens (7)
To on beam splitter (3)；
Beam splitter (3) is to the upper photon by delay and the lower light reflected by semi-transparent semi-reflecting lens (7) or part reflective mirror to be measured (8)
Son is split；First detector (4) and the second detector (5) are located at two exit ends of beam splitter (3), are respectively used to detect
Optical signal after beam splitter (3) beam splitting, and the optical signal of detection is exported and gives coincidence measurement logic computer (9)；
The optical signal that coincidence measurement logic computer (9) detects the first detector (4) and the second detector (5), which is done, meets logic
It calculates, the upper photon of delay is passed through with judgement and is by the lower photon that semi-transparent semi-reflecting lens (7) or part reflective mirror to be measured (8) reflect
It is no to interfere cancellation, when by the τ that is delayed1Upper photon and by semi-transparent semi-reflecting lens (7) reflection lower photon interfere phase
Disappear, by the τ that is delayed2Upper photon and by part reflective mirror (8) to be measured reflection lower photon interfere cancellation when, utilize formulaPart reflective mirror (8) to be measured is calculated to the distance between semi-transparent semi-reflecting lens (7) l.
2. a kind of rangefinder based on HOM principle of interference according to claim 1, it is characterised in that: the coincidence measurement
The optical signal that logic computer (9) detects the first detector (4) and the second detector (5), which is done, meets logic calculation, with judgement
Whether the lower photon that upper photon and process semi-transparent semi-reflecting lens (7) or part reflective mirror to be measured (8) by delay reflect interferes
The implementation of cancellation is as follows:
(a) the partially larger than preset threshold value of the optical signal overlapping detected when the first detector (4) and the second detector (5)
When, meeting the coincidence counting that logic calculation obtains is 1, and there is no interfering cancellation for upper photon and lower photon at this time；
(b) part of the optical signal overlapping detected when the first detector (4) and the second detector (5) is less than preset threshold value
When, meeting the coincidence counting that logic calculation obtains is 0, and upper photon and lower photon interfere cancellation at this time.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107942339B (en) * | 2017-10-13 | 2021-07-27 | 华东师范大学 | Photon counting laser interference distance measuring method |
| CN109375449B (en) * | 2018-12-24 | 2022-03-25 | 南京邮电大学 | Method for controlling two-photon quantum interference curve |
| CN117029714B (en) * | 2023-10-09 | 2023-12-22 | 中国人民解放军国防科技大学 | Anti-interference holographic image generation system and method based on quantum interference |
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| US4413905A (en) * | 1978-08-08 | 1983-11-08 | Honeywell Inc. | Laser range meter |
| CN103135197A (en) * | 2013-02-06 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | Light path superposition and balance adjusting method based on equal inclination interference principle |
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| CN104749650A (en) * | 2015-03-25 | 2015-07-01 | 北京航天控制仪器研究所 | Novel HOM interference theory based gravity instrument |
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| US9110158B2 (en) * | 2013-09-19 | 2015-08-18 | Raytheon Bbn Technologies Corp. | Biphoton ranging with HOM interference |
| CN103675801A (en) * | 2013-12-02 | 2014-03-26 | 上海交通大学 | Navigation and distance measurement system on basis of quantum entanglement light and method for implementing navigation and distance measurement system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4413905A (en) * | 1978-08-08 | 1983-11-08 | Honeywell Inc. | Laser range meter |
| CN103135197A (en) * | 2013-02-06 | 2013-06-05 | 中国科学院西安光学精密机械研究所 | Light path superposition and balance adjusting method based on equal inclination interference principle |
| CN104199017A (en) * | 2014-08-05 | 2014-12-10 | 上海交通大学 | Real-time range measurement system based on quantum entangled light and implementation method thereof |
| CN104698466A (en) * | 2014-12-12 | 2015-06-10 | 中国航空工业集团公司北京长城计量测试技术研究所 | Remote dynamic target distance measuring device and method |
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| CN104749650A (en) * | 2015-03-25 | 2015-07-01 | 北京航天控制仪器研究所 | Novel HOM interference theory based gravity instrument |
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